MMmm, I dont MR/AR at the mo, so will hold that thought for now then..
One thing I have noticed though, if you have a different interface, in my case the AMVR one, it can limit the ability to flip the headset up which is a bit of a pita..
Does the buzz only effect the BOBOVR battery as my KKCOBVR one is silent..
Many headstrap batteries and battery packs were making the buzzing sound when the Q3 first came out. Since then some manufacturers have improved the batteries to eliminate the buzz.